President Bush isn't on the ballot tomorrow. But this election is, nonetheless, all about him. The question is whether voters will pry his fingers loose from at least some of the levers of power, thereby limiting the damage he can inflict in his two remaining years in office.

There are still some people urging Mr. Bush to change course. For example, a scathing editorial published today by The Military Times, which calls on Mr. Bush to fire Donald Rumsfeld, declares that "this is not about the midterm elections." But the editorial's authors surely know better than that. Mr. Bush won't fire Mr. Rumsfeld; he won't change strategy in Iraq; he won't change course at all, unless Congress forces him to.

At this point, nobody should have any illusions about Mr. Bush's character. To put it bluntly, he's an insecure bully who believes that owning up to a mistake, any mistake, would undermine his manhood — and who therefore lives in a dream world in which all of his policies are succeeding and all of his officials are doing a heckuva job. Just last week he declared himself "pleased with the progress we're making" in Iraq.

In other words, he's the sort of man who should never have been put in a position of authority, let alone been given the kind of unquestioned power, free from normal checks and balances, that he was granted after 9/11. But he was, alas, given that power, as well as a prolonged free ride from much of the news media.

The results have been predictably disastrous. The nightmare in Iraq is only part of the story. In time, the degradation of the federal government by rampant cronyism — almost every part of the executive branch I know anything about, from the Environmental Protection Agency to the Centers for Disease Control and Prevention, has been FEMAfied — may come to be seen as an equally serious blow to America's future.

And it should be a matter of intense national shame that Mr. Bush has quietly abandoned his fine promises to New Orleans and the rest of the Gulf Coast.

The public, which rallied around Mr. Bush after 9/11 and was still prepared to give him the benefit of the doubt two years ago, seems to have figured most of this out. It's too late to vote Mr. Bush out of office, but most Americans seem prepared to punish Mr. Bush's party for his personal failings. This is in spite of a vicious campaign in which Mr. Bush has gone further than any previous president — even Richard Nixon — in attacking the patriotism of anyone who criticizes him or his policies.

That said, it's still possible that the Republicans will hold on to both houses of Congress. The feeding frenzy over John Kerry's botched joke showed that many people in the news media are still willing to be played like a fiddle. And if you think the timing of the Saddam verdict was coincidental, I've got a terrorist plot against the Brooklyn Bridge to sell you.

Moreover, the potential for vote suppression and/or outright electoral fraud remains substantial. And it will be very hard for the Democrats to take the Senate for the very simple reason that only one-third of Senate seats are on this ballot.

What if the Democrats do win? That doesn't guarantee a change in policy.

The Constitution says that Congress and the White House are co-equal branches of government, but Mr. Bush and his people aren't big on constitutional niceties. Even with a docile Republican majority controlling Congress, Mr. Bush has been in the habit of declaring that he has the right to disobey the law he has just signed, whether it's a law prohibiting torture or a law requiring that he hire qualified people to run FEMA.

Just imagine, then, what he'll do if faced with demands for information from, say, Congressional Democrats investigating war profiteering, which seems to have been rampant. Actually, we don't have to imagine: a White House strategist has already told Time magazine that the administration plans a "cataclysmic fight to the death" if Democrats in Congress try to exercise their right to issue subpoenas — which is one heck of a metaphor, given Mr. Bush's history of getting American service members trapped in cataclysmic fights where the deaths are anything but metaphors.

But here's the thing: no matter how hard the Bush administration may try to ignore the constitutional division of power, Mr. Bush's ability to make deadly mistakes has rested in part on G.O.P. control of Congress. That's why many Americans, myself included, will breathe a lot easier if one-party rule ends tomorrow.